8 3/4 vs 9 3/4

As long as you don't need a pinion snubber using a truck rear is not a problem . what you'll need to get is brakes , you can use them off your 8 3/4 unless they are the SBP stuff, axles and more than likely spiders as I don't think the sure grip in that rear is the same spline count , usually 30 , as what is available aftermarket , you may have to buy a new sure grip as that truck rear probably has a trac lock , they aren't that good , the puls is you can sell it to someone who wants to add a suregrip to their truck. You'll also need housing ends .

The Dr. Diff rear is a very good price considering what you get .